Quick disassembly and assembly and material accumulation prevention structure of semi-ball valve

Abstract

The utility model relates to the field of semi-ball valves, in particular to a quick dismounting and material accumulation prevention structure and method for a semi-ball valve. A quick disassembly and assembly and material accumulation prevention structure of a semi-ball valve comprises a valve body, a channel is arranged on the valve body, one end of the channel is an inlet side, the other end of the channel is an outlet side, a valve seat is arranged in the valve body, a valve element assembly is arranged on the valve seat, the valve element assembly is connected with a valve rod, the valve rod extends out of the valve body, an inlet side flange assembly is arranged on the inlet side, and an outlet side flange assembly is arranged on the outlet side. An outlet side flange assembly is arranged on the outlet side. The structure and the method have the remarkable effects that the structure and the method for quickly disassembling and assembling the semi-ball valve and preventing the material accumulation are provided, and the valve is simple and reasonable in overall structure and has a long-distance maintenance and replacement function. By introducing the expansion joint and the piston ring, the valve has a quick disassembly and assembly function, and meanwhile, no radioactive material is accumulated in the valve cavity, so that the radioactive level is reduced during maintenance, and maintenance is facilitated.

Description

Technical Field

[0001] The invention relates to the field of hemispherical valves, and in particular to a quick disassembly and assembly and material accumulation prevention structure of a hemispherical valve. Background Art

[0002] In chemical engineering, the fluid media transported by vertical pipelines in some process systems contain solid particles or powders. These special media are not suitable for close contact with personnel, and valves with shut-off functions need to be opened and closed frequently. At present, the double-eccentric hemispherical valve is the preferred valve in the industry to meet this working condition. The double-eccentric hemispherical valve has advantages such as wear resistance of the sealing pair and long life. However, due to the special nature of the medium, repairing this type of valve has become a current technical challenge. Therefore, there is an urgent need to provide a hemispherical valve that can meet the working conditions, realize remote valve replacement, have a quick disassembly and assembly function, and no material accumulation in the valve cavity, so as to reduce the radioactivity level during maintenance and facilitate inspection and maintenance. Utility Model Content

[0003] The present invention aims to solve the defects of the prior art and provides a structure and method for quickly disassembling and assembling a hemispherical valve and preventing material accumulation.

[0004] The present invention is achieved as follows: a quick disassembly and assembly and material accumulation prevention structure of a hemispherical valve, including a valve body, a channel is provided on the valve body, one end of the channel is the inlet side, and the other end of the channel is the outlet side, a valve seat is provided in the valve body, a valve core assembly is provided on the valve seat, the valve core assembly is connected to the valve stem, and the valve stem extends out of the valve body, wherein the inlet side is provided with an inlet side flange assembly, and the outlet side is provided with an outlet side flange assembly.

[0005] As described above, a quick disassembly and assembly and material accumulation prevention structure of a hemispherical valve, wherein the valve core assembly includes an eccentric hemispherical body and a piston ring, positioning shafts are provided at both ends of the eccentric hemispherical body, and grooves are provided in the circumference. The piston ring is installed in the groove and fits tightly. The first positioning shaft and the piston ring are matched with the valve body hole, and the second positioning shaft and the piston ring are matched with the valve cover hole. A flat hole is provided in the center of the second positioning shaft of the eccentric hemispherical body. The shape of the flat hole matches the shape of the end of the valve stem. When the valve stem rotates, the valve core assembly is driven to rotate together.

[0006] As described above, a quick disassembly and assembly and material accumulation prevention structure of a hemispherical valve, wherein the inlet side flange assembly includes an inlet side flange, an expansion joint, a piston ring, and an inlet flange; a groove is provided on the inlet side flange, and the piston ring is installed in the groove of the inlet side flange; the inlet side flange passes through the expansion joint, and one end of the inlet side flange together with the piston ring is embedded in the through hole of the inlet flange, and the outer side surface of the piston ring is tightly fitted with the inlet flange hole and can slide axially to prevent the medium from entering the gap between the expansion joint and the inlet side flange; the first end of the expansion joint is welded to the inlet side flange, and the second end of the expansion joint is welded to the first end of the inlet flange.

[0007] As described above, a quick disassembly and assembly and material accumulation prevention structure of a hemispherical valve is provided, wherein the lower end face of the inlet flange is provided with a protrusion, a groove is provided circumferentially of the protrusion, and the piston ring is installed in the inlet flange groove and fits tightly; the piston ring fits tightly with the valve seat hole and can slide axially to prevent the medium from entering the gap between the valve body and the valve seat.

[0008] As described above, a quick disassembly and assembly and material accumulation prevention structure of a hemispherical valve, wherein the outlet side flange assembly includes an outlet flange, an expansion joint, a piston ring, and an outlet side flange; a groove is provided in the outlet flange, and the piston ring is installed in the outlet flange groove; the outlet flange passes through the expansion joint, and one end of the outlet flange together with the piston ring is embedded in the through hole of the outlet side flange, and the outer side surface of the piston ring is tightly fitted with the outlet side flange hole and can slide axially to prevent the medium from entering the gap between the expansion joint and the outlet flange; the first end of the expansion joint is welded to the outlet flange, and the second end of the expansion joint is welded to the outlet side flange.

[0009] In the quick disassembly and assembly and material accumulation prevention structure of the hemispherical valve as described above, the outlet flange channel hole is a bell mouth.

[0010] The quick disassembly and assembly and material accumulation prevention structure of a hemispherical valve as described above, wherein the valve stem is connected to the valve core assembly and passes through the shaft sleeve, valve stem disc spring, valve cover, stuffing pad, stuffing, press sleeve, and pressure plate in sequence, the shaft sleeve and valve stem disc spring are placed between the valve stem shaft shoulder and the valve cover hole shoulder, the stuffing pad and stuffing are placed in the axial gap between the valve cover and the valve stem, and are fixed after being compressed by the press sleeve and the pressure plate through the studs and nuts, a sealing gasket is placed between the valve cover and the valve body, and is fixed by the studs and nuts; the valve seat is placed on the valve body inlet On the supporting surface of the side channel hole; the sealing ring, valve seat pressure ring, valve seat disc spring and valve seat cover are installed in sequence on the supporting surface of the valve seat inlet side, and the valve seat cover compresses the valve seat disc spring and sealing ring and then is fixed to the valve body through screws; when the valve stem rotates, the valve core assembly is driven to rotate together, and when the valve core assembly is in the closed position, the sealing sphere of the valve core assembly and the sealing sphere of the valve seat form a surface seal through the pre-tightening force of the valve seat disc spring and the eccentric force; the inlet side flange assembly and the valve body are fixedly connected; the outlet side flange assembly and the valve body are fixedly connected.

[0011] The significant benefits of this new design include providing a structure and method for quickly disassembling and assembling a hemispherical valve and preventing material accumulation. The valve's overall structure is simple and rational, enabling remote maintenance and replacement. The introduction of an expansion joint and piston ring allows for quick assembly and disassembly. Furthermore, no radioactive material accumulates within the valve cavity, reducing radioactivity levels during maintenance and facilitating inspection and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention;

[0013] Figure 2It is a schematic diagram of the valve core assembly;

[0014] Figure 3 It is a schematic diagram of the connection between the valve core assembly and the valve stem;

[0015] Figure 4 It is the inlet flange assembly;

[0016] Figure 5 It is the outlet flange assembly;

[0017] Figure 6a is a schematic cross-sectional view of a piston ring;

[0018] Figure 6b It is a top view of the piston ring;

[0019] Figure 7 This is a schematic diagram of the clamp connection.

[0020] In the figure: 1. Inlet side flange assembly; 2. Valve body; 3. Valve seat pressure cover; 4. Valve seat disc spring; 5. Valve seat pressure ring; 6. Sealing ring; 7. Valve seat; 8. Valve core assembly; 9. Valve stem; 10. Bushing; 11. Valve stem disc spring; 12. Valve cover; 13. Packing pad; 14. Packing; 15. Pressure sleeve; 16. Pressure plate; 17. Outlet side flange assembly; 18. Eccentric hemisphere; 19. Piston ring; 20. Inlet side flange; 21. Expansion joint; 22. Piston ring; 23. Inlet flange; 24. Outlet flange; 25. Expansion joint; 26. Piston ring; 27. Outlet side flange; 28. Pipe flange; 29. Sealing gasket; 30. Clamp assembly. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1As shown, the new model provides a quick disassembly and assembly and material accumulation prevention structure of a hemispherical valve, which includes: an inlet side flange assembly 1, a valve body 2, a valve seat pressure cover 3, a valve seat disc spring 4, a valve seat pressure ring 5, a sealing ring 6, a valve seat 7, a valve core assembly 8, a valve stem 9, a shaft sleeve 10, a valve stem disc spring 11, a valve cover 12, a stuffing pad 13, a stuffing 14, a pressing sleeve 15, and a pressure plate 16; the valve core assembly 8 is placed in the valve body 2, the first end cooperates with the valve body 2 to achieve axial fixation, and the second end cooperates with the valve cover 12 hole, the valve stem 9 is connected to the valve core assembly 8 and passes through the shaft sleeve 10, the valve stem disc spring 11, the valve cover 12, the stuffing pad 13, the stuffing 14, the pressing sleeve 15, and the pressure plate 16 in sequence, the shaft sleeve 10 and the valve stem disc spring 11 are placed between the valve stem 9 shaft shoulder and the valve cover 12 hole shoulder, the stuffing pad 13 and the stuffing 14 are placed on the valve cover 1 2 and the valve stem 9 in the axial gap, and is fixed after being compressed by the pressing sleeve 15 and the pressing plate 16 with studs and nuts. A sealing gasket is placed between the valve cover 12 and the valve body 2, and is fixed by studs and nuts; the valve seat 7 is placed on the support surface of the channel hole on the inlet side of the valve body 2; the sealing ring 6, the valve seat pressure ring 5, the valve seat disc spring 4 and the valve seat pressure cover 3 are installed on the support surface on the inlet side of the valve seat 7 in sequence, and the valve seat pressure cover 3 compresses the valve seat disc spring 4 and the sealing ring 6 and is fixed to the valve body by screw connection; when the valve stem 9 rotates, it drives the valve core assembly 8 to rotate together. When the valve core assembly 8 is in the closed position, the sealing sphere of the valve core assembly 8 and the sealing sphere of the valve seat 7 form a surface seal through the preload force and eccentric force of the valve seat disc spring 11; the inlet side flange assembly 1 and the valve body 2 are fixedly connected; the outlet side flange assembly 17 and the valve body 2 are fixedly connected.

[0023] The structure and connection method of each component are described in detail below.

[0024] Preferably, if Figure 2 As shown, the valve core assembly 8 also includes an eccentric hemisphere 18 and a piston ring 19. Positioning shafts are provided at both ends of the eccentric hemisphere 18, and grooves are provided in the circumference. The piston ring 19 is installed in the groove and fits tightly. The first positioning shaft and the piston ring are matched with the valve body hole, and the second positioning shaft and the piston ring are matched with the valve cover hole.

[0025] like Figure 3 As shown, a flat hole is provided at the center of the second positioning axis of the eccentric hemisphere 18, which is fixedly connected to the flat axis at the bottom of the valve stem 9. When the valve stem 9 rotates, it can drive the valve core assembly 8 to rotate together.

[0026] like Figure 4As shown, the inlet flange assembly 1 also includes: an inlet side flange 20, an expansion joint 21, a piston ring 22, and an inlet flange 23; the inlet side flange 20 is provided with a groove, and the piston ring 22 is installed in the inlet side flange groove; the inlet side flange 20 passes through the expansion joint 21, and one end of the inlet side flange 20 together with the piston ring 22 is embedded in the through hole of the inlet flange 23, and the outer side surface of the piston ring 22 is tightly fitted with the hole of the inlet flange 23 and can slide axially, so as to prevent the medium from entering the gap between the expansion joint 21 and the inlet side flange 20; the first end of the expansion joint 21 is welded to the inlet side flange 20, and the second end of the expansion joint 21 is welded to the first end of the inlet flange 23.

[0027] The lower end surface of the inlet flange 23 has a protrusion, and a groove is arranged circumferentially around the protrusion. The piston ring 22 is installed in the groove of the inlet flange 23 and fits tightly; the piston ring 22 fits tightly with the hole of the valve seat 7 and can slide axially to prevent the medium from entering the gap between the valve body 2 and the valve seat 7.

[0028] like Figure 5 As shown, the outlet side flange assembly 17 also includes: an outlet flange 24, an expansion joint 25, a piston ring 26, and an outlet side flange 27; the outlet flange 24 is provided with a groove, and the piston ring 26 is installed in the groove of the outlet flange 24; the outlet flange 24 passes through the expansion joint 25, and one end of the outlet flange 24 together with the piston ring 26 is embedded in the through hole of the outlet side flange 27, and the outer side surface of the piston ring 26 is tightly fitted with the hole of the outlet side flange 27 and can slide axially, which is used to prevent the medium from entering the gap between the expansion joint 25 and the outlet flange 24; the first end of the expansion joint 25 is welded to the outlet flange 24, and the second end of the expansion joint 25 is welded to the outlet side flange 27.

[0029] The channel hole of the outlet flange 24 is a bell mouth.

[0030] As shown in FIG6 , the piston ring 19 , the piston ring 22 , and the piston ring 26 are all metal self-tensioning sealing rings used to prevent the medium from entering the axial gap.

[0031] Expansion joints 21 and 25 are internal pressure-bearing structures used to isolate the radioactive medium in the valve cavity from the outside of the valve cavity. When the valve is replaced at a long distance, they can be axially extended or compressed to facilitate the connection of the inlet side flange with the fixed pipeline flange.

[0032] Utilizing the above-mentioned quick disassembly and assembly and material accumulation prevention structure of a hemispherical valve, the present invention also provides a quick disassembly and assembly and material accumulation prevention method of a hemispherical valve, which is specifically as follows:

[0033] According to the actual application scenario requirements of the hemispherical valve, the valve is installed on the vertical pipeline, such as Figure 7As shown, one end of the inlet flange 20 is half of a clamp quick connector, which is connected to the other half of the quick connector fixed to the upper pipe, with a sealing gasket placed in the middle. The connected quick connectors are clamped and fixed with screws. One end 27 of the outlet flange is half of a clamp quick connector, which is connected to the other half of the quick connector fixed to the lower pipe, with a sealing gasket placed in the middle. The connected quick connectors are fixed with a clamp. When the valve is open, the medium flows in the valve cavity of the pipeline machine. When the valve is closed, the flow of the medium in the pipeline is cut off. When the valve is replaced remotely, first use remote auxiliary equipment to loosen the inlet and outlet clamp screws respectively, remove the clamps, and use special maintenance equipment to apply force along the pipeline toward the valve body at the same time. The upper and lower expansion joints are compressed, the valve quick connector and the pipeline quick connector are separated, and the valve is removed by special equipment to achieve remote rapid disassembly of the valve. The remote rapid installation steps are the opposite. To prevent material from accumulating in the valve cavity when replacing the valve, there should be no steps between the flow channels of different diameters in the valve cavity. A transition section is set to allow the material to flow out of the valve cavity by its own gravity. Piston rings are set in the gaps between the components, and the self-tensioning properties of the piston rings are used to achieve dynamic and static sealing to prevent material from entering the gaps between the parts.

[0034] The above specific implementation methods are used to explain the present invention rather than to limit the present invention. Any modifications and changes made to the present invention by ordinary technicians in the relevant technical field within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A quick disassembly and assembly and material accumulation prevention structure for a hemispherical valve, comprising a valve body (2), a passage being provided on the valve body (2), one end of the passage being an inlet side, and the other end of the passage being an outlet side, a valve seat (7) being provided in the valve body (2), a valve core assembly (8) being provided on the valve seat (7), the valve core assembly (8) being connected to a valve stem (9), and the valve stem (9) extending out of the valve body (2), characterized in that: An inlet side flange assembly (1) is provided on the inlet side, and an outlet side flange assembly (17) is provided on the outlet side.

2. The quick disassembly and assembly and material accumulation prevention structure of a hemispherical valve according to claim 1, characterized in that: The valve core assembly (8) includes an eccentric hemisphere (18) and a piston ring. Positioning shafts are provided at both ends of the eccentric hemisphere (18), and grooves are provided in the circumferential direction. The piston ring is installed in the groove and fits tightly. The first positioning shaft and the piston ring match the valve body hole, and the second positioning shaft and the piston ring match the valve cover hole. A flat hole is provided at the center of the second positioning shaft of the eccentric hemisphere (18). The shape of the flat hole matches the shape of the end of the valve stem (9). When the valve stem (9) rotates, the valve core assembly (8) is driven to rotate together.

3. The quick disassembly and assembly and material accumulation prevention structure of a hemispherical valve according to claim 2, characterized in that: The inlet side flange assembly (1) comprises an inlet side flange (20), an expansion joint, a piston ring, and an inlet side flange (23); the inlet side flange (20) is provided with a groove, and the piston ring is installed in the groove of the inlet side flange (20); the inlet side flange (20) passes through the expansion joint, and one end of the inlet side flange (20) and the piston ring are embedded in the through hole of the inlet flange (23); the outer side surface of the piston ring is tightly fitted with the hole of the inlet flange (23) and can slide axially, so as to prevent the medium from entering the gap between the expansion joint and the inlet side flange (20); the first end of the expansion joint is welded to the inlet side flange (20), and the second end of the expansion joint is welded to the first end of the inlet flange (23).

4. The quick disassembly and assembly and material accumulation prevention structure of a hemispherical valve according to claim 3, characterized in that: The lower end surface of the inlet flange (23) is provided with a protrusion, and a groove is arranged around the protrusion. The piston ring is installed in the groove of the inlet flange (23) and fits tightly. The piston ring is tightly matched with the hole of the valve seat (7) and can slide axially to prevent the medium from entering the gap between the valve body (2) and the valve seat (7).

5. The quick disassembly and assembly and material accumulation prevention structure of a hemispherical valve according to claim 4, characterized in that: The outlet flange assembly (17) comprises an outlet flange (24), an expansion joint, a piston ring, and an outlet flange (27); the outlet flange (24) is provided with a groove, and the piston ring is installed in the groove of the outlet flange (24); the outlet flange (24) passes through the expansion joint, and one end of the outlet flange (24) and the piston ring are embedded in the through hole of the outlet flange (27); the outer side surface of the piston ring is tightly fitted with the hole of the outlet flange (27) and can slide axially, so as to prevent the medium from entering the gap between the expansion joint and the outlet flange (24); the first end of the expansion joint is welded to the outlet flange (24), and the second end of the expansion joint is welded to the outlet flange (27).

6. The quick disassembly and assembly and material accumulation prevention structure of a hemispherical valve according to claim 5, characterized in that: The channel hole of the outlet flange (24) is a bell mouth.

7. The quick disassembly and assembly and material accumulation prevention structure of a hemispherical valve according to claim 6, characterized in that: The valve stem (9) is connected to the valve core assembly (8) and passes through the shaft sleeve (10), valve stem disc spring (11), valve cover (12), stuffing pad (13), stuffing (14), pressing sleeve (15), and pressure plate (16) in sequence. The shaft sleeve (10) and valve stem disc spring (11) are placed between the shaft shoulder of the valve stem (9) and the hole shoulder of the valve cover (12). The stuffing pad (13) and stuffing (14) are placed in the axial gap between the valve cover (12) and the valve stem (9), and are fixed after being compressed by the pressing sleeve (15) and the pressure plate (16) through studs and nuts. A sealing gasket is placed between the valve cover (12) and the valve body (2), and is connected and fixed by studs and nuts. The valve seat (7) is placed on the valve body (2). On the supporting surface of the inlet channel hole; a sealing ring (6), a valve seat pressure ring (5), a valve seat disc spring (4) and a valve seat pressure cover (3) are sequentially installed on the supporting surface of the inlet side of the valve seat (7); the valve seat pressure cover (3) compresses the valve seat disc spring (4) and the sealing ring (6) and is fixed to the valve body by screw connection; when the valve stem (9) rotates, the valve core assembly (8) is driven to rotate together, and when the valve core assembly (8) is in the closed position, the sealing sphere of the valve core assembly (8) and the sealing sphere of the valve seat (7) form a surface seal through the pre-tightening force of the valve seat disc spring (4) and the eccentric force; the inlet side flange assembly (1) and the valve body (2) are fixedly connected; the outlet side flange assembly (17) and the valve body (2) are fixedly connected.

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